CN102267450B - Electro-hydraulic control type braking power assisting device - Google Patents
Electro-hydraulic control type braking power assisting device Download PDFInfo
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- CN102267450B CN102267450B CN201110125067.4A CN201110125067A CN102267450B CN 102267450 B CN102267450 B CN 102267450B CN 201110125067 A CN201110125067 A CN 201110125067A CN 102267450 B CN102267450 B CN 102267450B
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- 230000000694 effects Effects 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 230000002787 reinforcement Effects 0.000 claims description 23
- 238000004146 energy storage Methods 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000010720 hydraulic oil Substances 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The invention provides an electro-hydraulic control type braking power assisting device and relates to automobile running braking systems. The device transmits a braking pedal force to a braking main cylinder piston through a pedal push rod, a push rod spring and a piston push rod; a pressure sensor is arranged on the pedal push rod and a linear displacement sensor is arranged between the pedal push rod and the piston push rod so as to sense the speed of stepping on a braking pedal and a relative position between the pedal push rod and the piston push rod; a motor is controlled to drive a turbine and worm mechanism after the stepping speed and the relative position are processed by an electronic control unit; a pushing power assisting piston is driven by a power assisting screw rod so as to transmit hydraulic oil to a power application hydraulic cavity through an electromagnetic valve; and the hydraulic oil is loaded to the braking main cylinder piston for providing assisting power. When the braking pedal stops, the motor stops running and the device keeps a braking force on the basis of a self-locking function of screw threads; and when the braking pedal is released, the motor runs reversely and the hydraulic oil flows back to an assisting power hydraulic cavity to realize braking release. The electro-hydraulic control type braking assisting power device ensures the foot feeling during braking by keeping a compressed length of the push rod spring; therefore, a power remarkable and soft assisting effect is achieved.
Description
Technical field
The present invention relates to a kind of automobile electrohydraulic control series products, be specifically related to the brake booster of running brake system, be especially applicable to pure electric automobile and hybrid vehicle use.
Background technology
The service braking system of current car adopts servo braking system usually, on the basis of Manual hydraulic brake system, add a set of power servo formed, during normal brake application, braking energy major part is supplied by power servo, is applied to the braking force on brake pedal when can reduce chaufeur braking.And when power servo lost efficacy, provide whole braking energys by chaufeur, meet the needs of car brakeing.On car, main servo vacuum formula and the Pneumatic servo type brake system of adopting provides brake boost.
Vacuum servo formula servo braking system provides power-assisted by installing vacuum booster additional between brake pedal push rod and master brake cylinder.When vacuum booster provides brake boost, need to provide vacuum source by the induction maniflod of driving engine or special vacuum pump.When utilizing the induction maniflod of driving engine to provide vacuum source, if engine stop work, then vacuum servo event resolves.When driving engine is in different operating modes, provide the ability of vacuum also can be restricted, vacuum servo effect can weaken.The vacuum pump of application specific provides vacuum source, not only increases number of parts on automobile and corresponding control and reduces the reliability of automobile, also can increase the difficult arrangement of machinery space simultaneously and increase the work noise of automobile.Vacuum booster also also exists the larger shortcoming of volume.
Vacuum servo formula servo braking system provides power-assisted by installing air-assisted device between brake pedal push rod and master brake cylinder additional.When air-assisted device provides brake boost, need to provide pneumatic supply, correspondingly need to increase the parts such as Air compressor, air receiver, control cock, pressure regulating valve, airfilter, deicer, low pressure warning switch and airline.The power of vacuum servo formula servo braking system not only consumption of engine, car noise also can increase, and the layout of automobile engine nacelle is also more difficult.
At present for the requirement of environmental protection, the application of pure electric automobile and hybrid vehicle gets more and more.Because electronlmobil replaces traditional combustion engine with electrical motor, lose the possibility utilizing combustion engine to provide vacuum source, and hybrid vehicle take also electrical motor as main power source or all using electrical motor as propulsion source, now vacuum source must realize with vacuum pump in some occasion.
Summary of the invention
The present invention is directed to the shortcoming that traditional car service brake provides power-assisted mode, a kind of electro-hydraulic control type braking power assisting is provided, traditional braking work-saving device can be replaced, be especially applicable to pure electric automobile and hybrid vehicle use.
Electro-hydraulic control type braking power assisting of the present invention, be made up of mechanical-force-transmission system, hydraulic booster system and electronic control system, the treadle effort of chaufeur is directly delivered to master brake cylinder by mechanical-force-transmission system, hydraulic booster system is using fluid as working medium, the transmission of power of electrical motor in electronic control system is carried out power-assisted to master brake cylinder, wherein, mechanical-force-transmission system comprises pedal push rod 9, push rod spring 10, piston push rod 7; Hydraulic booster system comprises power-assisted worm screw 18, power-assisted turbine 20, first radial ball bearing 17 and the second radial ball bearing 21, power-assisted screw rod 22, boosting piston 24, power-assisted room spring 25, power-assisted room rear housing 16, power-assisted room front case 23, reinforcement room housing 3, energy storage piston 5, energy stroage spring 6, reservoir 27, limiting valve 26 and connecting tube; Electronic control system comprises pressure sensor 11, Linear displacement transducer 8, electronic control unit 14, current detection circuit 15, electrical motor 19, electromagnetic valve 32.
Built-in push rod spring 10 in the pedal push rod 9 of the mechanical-force-transmission system of electro-hydraulic control type braking power assisting of the present invention, piston push rod 7 and pedal push rod 9 is made to keep relative movement, formation elasticity connects, free extended configuration is just in time in when brake pedal 12 return, when brake pedal 12 is operated, push rod spring 10 is compressed by pedal push rod 9 and piston push rod 7, and its certain amount of compression is used for ensureing the size of brake pedal force, provides the foundation of power-assisted as hydraulic booster system simultaneously.
Power-assisted room front case 23, the power-assisted room rear housing 16 of the hydraulic booster system of electro-hydraulic control type braking power assisting of the present invention dock, form cavity, the parts such as built-in power-assisted turbine 20, first radial ball bearing 17 and the second radial ball bearing 21, power-assisted screw rod 22, boosting piston 24, power-assisted room spring 25, wherein power-assisted turbine 20 both sides are provided with shoulder, first radial ball bearing 17 and the second radial ball bearing 21 is set respectively, and the first radial ball bearing 17 and the second radial ball bearing 21 connect with the interior shoulder of power-assisted room front case 23, power-assisted room rear housing 16; The screw thread that power-assisted turbine 20 is processed by center again connects with power-assisted screw rod 22; Power-assisted screw rod 22 rear end is square, and coordinate with the square sky on power-assisted room rear housing 16, front end connects with boosting piston 24; The front end of boosting piston 24 is provided with power-assisted room spring 25; Power-assisted room front case 23, the power-assisted room rear housing 16 of hydraulic booster system are provided with gap, and built-in power-assisted worm screw 18, is connected by axle with electrical motor 19, and worm screw connects with power-assisted turbine 20; The reinforcement room housing 3 of hydraulic booster system docks with master brake cylinder housing 1, inside establishes energy storage piston 5 and energy stroage spring 6.
Linear displacement transducer 8 two ends of the electronic control system of electro-hydraulic control type braking power assisting of the present invention are fixed on piston push rod 7 and pedal push rod 9 respectively, pedal push rod 9 is provided with pressure sensor 11, wherein Linear displacement transducer 8, pressure sensor 11, electromagnetic valve 32, electrical motor 19 are connected with electronic control unit 14 by wire, and electrical motor 19 is provided with current detection circuit 15 with the link circuit of electronic control unit 14, current detection circuit 15 is also connected with electronic control unit 14 by wire.
Power-assisted room front case 23 in electro-hydraulic control type braking power assisting of the present invention is provided with oil duct d, with the oil duct c intercommunication of electromagnetic valve 32, and the oil duct a intercommunication that the oil duct b of electromagnetic valve and reinforcement room housing 3 are arranged.
Energy storage piston 5 in reinforcement room housing 3 in electro-hydraulic control type braking power assisting of the present invention compressible energy stroage spring 6 under oil pressure effect.
According to electro-hydraulic control type braking power assisting of the present invention, measure pedal push rod 9 and piston push rod 7 relative position when braking owing to being provided with Linear displacement transducer 8, can the amount of compression of indirect determination push rod spring 10.In conjunction with the elasticity of push rod spring 10, its certain amount of compression is used for allowing the dynamics of chaufeur sense operation brake pedal 12, also provides the foundation of power-assisted size as electro-hydraulic control type braking power assisting simultaneously.Electronic control unit 14 is by the amount of movement of electrical motor 19 with fixing mechanical mechanism controls power-assisted screw rod 22, thus control to be transferred to reinforcement hydraulic cavities A hydraulic pressure oil mass from assisted hydraulic chamber D, the relative displacement of pedal push rod 9 and piston push rod 7 can not only be ensured, realize certain power-assisted effect, also ensureing that push rod spring 10 is in certain amount of compression when braking, when ensureing chaufeur braking, having good pedal operation performance.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that electro-hydraulic control type braking power assisting of the present invention is in non-brake state.
Fig. 2 is the schematic diagram that electro-hydraulic control type braking power assisting of the present invention is in braking mode.
Fig. 3 is the schematic diagram of electro-hydraulic control type braking power assisting of the present invention when brake pedal discharges.
The schematic diagram of braking mode when Fig. 4 is the electronic control unit failure of electro-hydraulic control type braking power assisting of the present invention.
The schematic diagram of braking mode when Fig. 5 is the electric motor fails of electro-hydraulic control type braking power assisting of the present invention.
Fig. 6 is the schematic diagram of electro-hydraulic control type braking power assisting of the present invention along Fig. 1 section line A-A.
Fig. 7 is the schematic diagram of electro-hydraulic control type braking power assisting of the present invention along Fig. 1 section line B-B.
Fig. 8 is the schematic diagram of electromagnetic valve state in electro-hydraulic control type braking power assisting of the present invention.
Noted in the appended drawings: 1-2 - brake master cylinder piston brake master cylinder shell 3-4 - power chamber shell card energy storage piston ring 5-6 - energy storage spring 7 - the piston push rod 8-9 - linear displacement sensor pedal putting 10-11-12 - brake pedal pressure sensor push-rod spring 13 - push rod pin 14 - electronic control unit 15-16 - current detection circuit power chamber shell after 17 18 - the first is always the heart ball bearing motor power worm 19-20 - power turbine 21-22 second centripetal ball bearings - power screw 23 - dynamical chamber shell before 24 - power piston 25 to dynamical room spring 26-27 - accumulator pressure limiting valve 28-29 - electromagnetic relief valve solenoid valve core 30-32-31 - solenoid valve solenoid valve spring coil electromagnetic valve hydraulic chamber B - A - gain force liquid storage chamber C - electromagnetic valve cavity D - A - power booster cavity chamber oil B and C - D - power chamber oil solenoid valve oil tao e - pressure limiting valve oil
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the present invention is further illustrated.
As shown in Figure 1, a kind of electro-hydraulic control type braking power assisting is made up of mechanical-force-transmission system, hydraulic booster system and electronic control system, the treadle effort of chaufeur is directly delivered to master brake cylinder by mechanical-force-transmission system, the transmission of power of electrical motor in electronic control system, using fluid as working medium, is carried out power-assisted to master brake cylinder by hydraulic booster system.Mechanical-force-transmission system comprises pedal push rod 9, push rod spring 10, piston push rod 7.Hydraulic booster system comprises power-assisted worm screw 18, power-assisted turbine 20, first radial ball bearing 17 and the second radial ball bearing 21, power-assisted screw rod 22, boosting piston 24, power-assisted room spring 25, power-assisted room rear housing 16, power-assisted room front case 23, reinforcement room housing 3, energy storage piston 5, energy stroage spring 6, also has the annexes such as reservoir 27, limiting valve 26 and connecting tube.Electronic control system comprises pressure sensor 11, Linear displacement transducer 8, electronic control unit 14, current detection circuit 15, electrical motor 19, electromagnetic valve 32.
Piston push rod 7 in mechanical-force-transmission system and pedal push rod 9 can slide mutually, and push rod spring 10 is placed in pedal push rod 9, when not braking, are in free extended configuration.
Power-assisted worm screw 18 in hydraulic booster system and power-assisted turbine 20 are in engagement, and power-assisted turbine 20 is threaded with power-assisted screw rod 22, and power-assisted screw rod 22 rear end is square, and retrain it and rotate, front end is connected with boosting piston 24.Power-assisted room spring 25 is in Pre strained state.Fluid is full of reinforcement hydraulic cavities A, electromagnetic valve sap cavity C, assisted hydraulic chamber D, reinforcement room oil duct a, electromagnetic valve oil duct b and c, power-assisted room oil duct d, limiting valve oil duct e and connected pipes.
Electro-hydraulic control type braking power assisting is not when brake pedal 12 is stepped on, piston push rod 7, power-assisted screw rod 22 are in low order end, valve core of the electromagnetic valve 28 is in reset mode under the effect of electromagnetic valve spring 30, each sap cavity A, C, D are all communicated with reservoir 27 with each oil duct a, b, c, d, e, energy storage piston 5, under the effect of energy stroage spring 6, contacts with snap ring 4.
As shown in Figure 2, when brake pedal 12 is operated, brake pedal force is directly delivered on brake master cylinder piston 2 by push rod pin 13, pedal push rod 9, pedal spring 10, piston push rod 7 by mechanical-force-transmission system.Meanwhile, pressure sensor 11 on pedal push rod 9 by the signal transmission of treadle effort to electronic control unit 14, electronic control unit 14 calculates the size of brake pedal force and the speed degree of change, judges the operation intention of chaufeur, controls electrical motor 19 and rotate forward.While electronic control unit 14 driving motor 19, also big current is applied to electromagnetic valve coil 31, make valve core of the electromagnetic valve 28 overcome the elastic force of electromagnetic valve spring 30, move to the left, the loop of shut electromagnetic valve oil duct b and c and reservoir 27.Electromagnetic valve state as shown in Figure 8.
The drive torque of electrical motor 19 is converted into the linear driving force of power-assisted screw rod 22 by the engaged transmission of power-assisted worm screw 18 and power-assisted turbine 20, power-assisted turbine 20 and the screw-driven of power-assisted screw rod 22.Power-assisted screw rod 22 promotes boosting piston 24 and moves to left, compression power-assisted room spring 25, fluid in the D of assisted hydraulic chamber is entered reinforcement hydraulic cavities A through power-assisted room oil duct d, electromagnetic valve oil duct c and b, reinforcement room oil duct a, promotion brake master cylinder piston 2 moves to left and provides power-assisted, the effect that the piston of promotion energy storage simultaneously 5 overcomes energy stroage spring 6 moves to right, the reduced space of energy-storing chamber B, energy stroage spring 6 is compressed, and carries out certain stored energy.
When hydraulic booster system provides power-assisted effect, the flow direction of fluid wherein as denoted by the arrows in fig. 2.
When hydraulic booster system provides power-assisted effect, Linear displacement transducer 8 in electronic control system detects the relative displacement of piston push rod 7 and pedal push rod 9, and transfer the signal to the electronic control unit 14, electronic control unit 14 calculates push rod spring 10 when being in certain amount of compression, stop driving motor 19, fluid in the D of assisted hydraulic chamber can not continue to enter reinforcement hydraulic cavities A, and power-assisted effect keeps.Because power-assisted worm screw 18 and power-assisted turbine 20, power-assisted turbine 20 and power-assisted screw rod 22 have fixing mechanical relation, the displacement that power-assisted screw rod 22 moves to left becomes certain corresponding relation with the amount of compression of push rod spring 10, while power-assisted is provided, the feel of driver's operation brake pedal 12 can be ensured.
As shown in Figure 3, when chaufeur cancels braking, brake pedal 12 drives pedal push rod 9 to reset by push rod pin 13, and brake master cylinder piston 2 moves to right under the fluid effect of brake system, promotes piston push rod 7 and resets.Because braking force is eliminated, pressure on pressure sensor 11 on pedal push rod 9 declines rapidly, this change of electronic control unit 14 perception, remove the electric current in electromagnetic valve coil 31 on the one hand, valve core of the electromagnetic valve 28 is made to get back to original position under the effect of electromagnetic valve spring 30, control electrical motor 19 on the other hand to reverse, power-assisted screw rod 22 is driven to move to right by the coordinating of power-assisted worm screw 18 and power-assisted turbine 20, power-assisted turbine 20 with coordinating of power-assisted screw rod 22, make the fluid in reinforcement hydraulic cavities A be back in the D of assisted hydraulic chamber, remove power-assisted effect.In this process, the also return gradually under the effect of energy stroage spring 6 of the energy storage piston 5 in reinforcement room housing 3.When power-assisted effect removed by hydraulic booster system, the flow direction of its fluid as indicated by the arrows in fig. 3.
As shown in Figure 4, electro-hydraulic control type braking power assisting of the present invention applies in braking procedure at chaufeur, as electronic control unit 14 lost efficacy, power-assisted can not be provided by driving motor 19 on the one hand, electric current can not be applied on the other hand to electromagnetic valve coil 31, control its motion, then chaufeur is directly delivered on brake master cylinder piston 2 by push rod pin 13, pedal push rod 9, push rod spring 10, piston push rod 7 to the operation of brake pedal 12, provides whole brake actions by manpower.Reinforcement hydraulic cavities A is supplemented by the fluid in reservoir 27 because volume increases the vacuum caused.
As shown in Figure 5, electro-hydraulic control type braking power assisting of the present invention applies in braking procedure at chaufeur, as electrical motor 19 lost efficacy, electronic control unit 14 is by current detection circuit 15 perception electrical motor 19 fault, remove the driving to electrical motor 19, and less electric current is applied to electromagnetic valve coil 31, valve core of the electromagnetic valve 28 is made to overcome the less application force of electromagnetic valve spring 30, mobile less distance, cut off the passage of reinforcement hydraulic cavities A and assisted hydraulic chamber D, only open the passage of reinforcement hydraulic cavities A and reservoir 27, the increase of reinforcement hydraulic cavities A volume is supplemented by the fluid in reservoir 27.In this case, electro-hydraulic control type braking power assisting of the present invention can not provide power-assisted effect, provides whole brake actions by manpower.
Claims (6)
1. an electro-hydraulic control type braking power assisting, it is characterized in that: it is made up of mechanical-force-transmission system, hydraulic booster system and electronic control system, the treadle effort of chaufeur is directly delivered to master brake cylinder by mechanical-force-transmission system, hydraulic booster system is using fluid as working medium, the transmission of power of electrical motor in electronic control system is carried out power-assisted to master brake cylinder, wherein, mechanical-force-transmission system comprises pedal push rod (9), push rod spring (10), piston push rod (7), hydraulic booster system comprises power-assisted worm screw (18), power-assisted turbine (20), the first radial ball bearing (17) and the second radial ball bearing (21), power-assisted screw rod (22), boosting piston (24), power-assisted room spring (25), power-assisted room rear housing (16), power-assisted room front case (23), reinforcement room housing (3), energy storage piston (5), energy stroage spring (6), reservoir (27), limiting valve (26) and connecting tube, electronic control system comprises pressure sensor (11), Linear displacement transducer (8), electronic control unit (14), current detection circuit (15), electrical motor (19), electromagnetic valve (32), pedal push rod (9) one end of described mechanical-force-transmission system is connected by push rod pin (13) with brake pedal (12), the processing of pedal push rod (9) other end is porose, built-in push rod spring (10), and piston push rod (7) one end is placed in one, piston push rod (7) and pedal push rod (9) is made to keep relative movement, formation elasticity connects, free extended configuration is just in time in when brake pedal (12) return, when brake pedal (12) is operated, push rod spring (10) is by pedal push rod (9) and piston push rod (7) compression, its certain amount of compression is used for ensureing the size of brake pedal force, the foundation of power-assisted is provided as hydraulic booster system simultaneously, and the other end of piston push rod (7) is placed in reinforcement room housing (3) with the brake master cylinder piston (2) of master brake cylinder housing (1) connects, power-assisted room front case (23) of described hydraulic booster system, power-assisted room rear housing (16) is docked, form cavity, built-in power-assisted turbine (20), first radial ball bearing (17) and the second radial ball bearing (21), power-assisted screw rod (22), boosting piston (24), power-assisted room spring (25), wherein power-assisted turbine (20) both sides are provided with shoulder, first radial ball bearing (17) and the second radial ball bearing (21) are set respectively, and the first radial ball bearing (17) and the second radial ball bearing (21) and power-assisted room front case (23), the interior shoulder of power-assisted room rear housing (16) connects, the screw thread that power-assisted turbine (20) is processed by center again connects with power-assisted screw rod (22), power-assisted screw rod (22) rear end is square, coordinates with the square opening on power-assisted room rear housing (16), and front end connects with boosting piston (24), the front end of boosting piston (24) is provided with power-assisted room spring (25), power-assisted room front case (23), power-assisted room rear housing (16) of hydraulic booster system are provided with gap, built-in power-assisted worm screw (18), connected by axle with electrical motor (19), and power-assisted worm screw (18) connects with power-assisted turbine (20), reinforcement room housing (3) of hydraulic booster system is docked with master brake cylinder housing (1), inside establishes energy storage piston (5) and energy stroage spring (6), described piston push rod (7) is provided with groove, and groove carries out spacing built with snap ring (4) to energy storage piston (5), energy storage piston (5) and energy stroage spring (6) empty set are on piston push rod (7), and energy stroage spring (6) is connected between energy storage piston (5) and reinforcement room housing (3) inwall, energy storage piston (5) in described reinforcement room housing (3) compressible energy stroage spring (6) under oil pressure effect, Linear displacement transducer (8) two ends of described electronic control system are fixed on piston push rod (7) and pedal push rod (9) respectively, pedal push rod (9) is provided with pressure sensor (11), wherein Linear displacement transducer (8), pressure sensor (11), electromagnetic valve (32), electrical motor (19) is connected with electronic control unit (14) by wire, and electrical motor (19) is provided with current detection circuit (15) with the link circuit of electronic control unit (14), current detection circuit (15) is also connected with electronic control unit (14) by wire, described power-assisted room front case (23) is provided with oil duct d, with the oil duct c intercommunication of electromagnetic valve (32), and the upper oil duct a intercommunication arranged of the oil duct b of electromagnetic valve and reinforcement room housing (3), described front case of vacuum booster (23) is provided with oil duct e, leads to reservoir (27) through limiting valve (26).
2. electro-hydraulic control type braking power assisting according to claim 1, is characterized in that: described pressure sensor (11) is piezoelectric pressure indicator.
3. electro-hydraulic control type braking power assisting according to claim 1, is characterized in that: described Linear displacement transducer (8) is differential transformer displace￣ ment transducer.
4. electro-hydraulic control type braking power assisting according to claim 1, is characterized in that: described electrical motor (19) is DC Brushless Motor.
5. electro-hydraulic control type braking power assisting according to claim 1, is characterized in that: the main detecting element in described current detection circuit (15) adopts sample resistance.
6. electro-hydraulic control type braking power assisting according to claim 1, is characterized in that: described electromagnetic valve (32) is 3-position-3-way solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110125067.4A CN102267450B (en) | 2011-05-05 | 2011-05-05 | Electro-hydraulic control type braking power assisting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110125067.4A CN102267450B (en) | 2011-05-05 | 2011-05-05 | Electro-hydraulic control type braking power assisting device |
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| CN102267450A CN102267450A (en) | 2011-12-07 |
| CN102267450B true CN102267450B (en) | 2015-07-15 |
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| CN201110125067.4A Expired - Fee Related CN102267450B (en) | 2011-05-05 | 2011-05-05 | Electro-hydraulic control type braking power assisting device |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102975706B (en) * | 2012-11-27 | 2015-04-08 | 奇瑞汽车股份有限公司 | Automobile brake boosting and controlling device |
| CN103448709B (en) * | 2013-06-28 | 2016-03-23 | 天津达诺信建筑材料销售有限公司 | Electromechanical full automaticity parking pump valve |
| CN104554223B (en) * | 2015-01-30 | 2018-08-21 | 深圳市云图电装系统有限公司 | A kind of electric booster braking device for vehicle |
| WO2018123530A1 (en) * | 2016-12-26 | 2018-07-05 | 日立オートモティブシステムズ株式会社 | Electric booster |
| CN107117143B (en) * | 2017-04-07 | 2019-07-23 | 江苏理工学院 | A kind of brake feel piezoelectric type adjustable damping brake treadle mechanism |
| US10641668B2 (en) * | 2018-01-23 | 2020-05-05 | Dresser, Llc | Measuring deformation of a compression spring to monitor performance of a safety valve |
| CN112049881B (en) * | 2020-10-23 | 2021-12-21 | 坤泰车辆系统（常州）有限公司 | Friction plate detection alarm system of fixed brake caliper of vehicle disc brake |
| CN112937517B (en) * | 2021-01-21 | 2022-12-23 | 浙江吉利控股集团有限公司 | Booster push rod structure, braking structure and vehicle |
| CN114347785A (en) * | 2022-01-10 | 2022-04-15 | 浙江新中南汽车零部件股份有限公司 | Power-assisted pedal assembly for new energy automobile |
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| DE102005036638A1 (en) * | 2004-10-15 | 2006-04-27 | Continental Teves Ag & Co. Ohg | Brake system for motor vehicles |
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